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-rw-r--r--src/station_cmd.cpp119
1 files changed, 109 insertions, 10 deletions
diff --git a/src/station_cmd.cpp b/src/station_cmd.cpp
index f8bf61968..477f761b4 100644
--- a/src/station_cmd.cpp
+++ b/src/station_cmd.cpp
@@ -3426,6 +3426,7 @@ void DeleteStaleLinks(Station *from)
RerouteCargo(from, c, to->index, from->index);
} else if (edge.LastUnrestrictedUpdate() != INVALID_DATE && (uint)(_date - edge.LastUnrestrictedUpdate()) > timeout) {
edge.Restrict();
+ ge.flows.RestrictFlows(to->index);
RerouteCargo(from, c, to->index, from->index);
} else if (edge.LastRestrictedUpdate() != INVALID_DATE && (uint)(_date - edge.LastRestrictedUpdate()) > timeout) {
edge.Release();
@@ -4069,10 +4070,10 @@ uint FlowStat::GetShare(StationID st) const
*/
StationID FlowStat::GetVia(StationID excluded, StationID excluded2) const
{
+ if (this->unrestricted == 0) return INVALID_STATION;
assert(!this->shares.empty());
- uint max = (--this->shares.end())->first;
- SharesMap::const_iterator it = this->shares.upper_bound(RandomRange(max));
- assert(it != this->shares.end());
+ SharesMap::const_iterator it = this->shares.upper_bound(RandomRange(this->unrestricted));
+ assert(it != this->shares.end() && it->first <= this->unrestricted);
if (it->second != excluded && it->second != excluded2) return it->second;
/* We've hit one of the excluded stations.
@@ -4081,12 +4082,12 @@ StationID FlowStat::GetVia(StationID excluded, StationID excluded2) const
uint end = it->first;
uint begin = (it == this->shares.begin() ? 0 : (--it)->first);
uint interval = end - begin;
- if (interval >= max) return INVALID_STATION; // Only one station in the map.
- uint new_max = max - interval;
+ if (interval >= this->unrestricted) return INVALID_STATION; // Only one station in the map.
+ uint new_max = this->unrestricted - interval;
uint rand = RandomRange(new_max);
SharesMap::const_iterator it2 = (rand < begin) ? this->shares.upper_bound(rand) :
this->shares.upper_bound(rand + interval);
- assert(it2 != this->shares.end());
+ assert(it2 != this->shares.end() && it2->first <= this->unrestricted);
if (it2->second != excluded && it2->second != excluded2) return it2->second;
/* We've hit the second excluded station.
@@ -4103,7 +4104,7 @@ StationID FlowStat::GetVia(StationID excluded, StationID excluded2) const
Swap(interval, interval2);
}
rand = RandomRange(new_max);
- SharesMap::const_iterator it3 = this->shares.end();
+ SharesMap::const_iterator it3 = this->shares.upper_bound(this->unrestricted);
if (rand < begin) {
it3 = this->shares.upper_bound(rand);
} else if (rand < begin2 - interval) {
@@ -4111,7 +4112,7 @@ StationID FlowStat::GetVia(StationID excluded, StationID excluded2) const
} else {
it3 = this->shares.upper_bound(rand + interval + interval2);
}
- assert(it3 != this->shares.end());
+ assert(it3 != this->shares.end() && it3->first <= this->unrestricted);
return it3->second;
}
@@ -4125,8 +4126,11 @@ void FlowStat::Invalidate()
assert(!this->shares.empty());
SharesMap new_shares;
uint i = 0;
+ uint orig = 0;
for (SharesMap::iterator it(this->shares.begin()); it != this->shares.end(); ++it) {
new_shares[++i] = it->second;
+ orig += it->first;
+ if (orig == this->unrestricted) this->unrestricted = orig;
}
this->shares.swap(new_shares);
assert(!this->shares.empty());
@@ -4134,7 +4138,7 @@ void FlowStat::Invalidate()
/**
* Change share for specified station. By specifing INT_MIN as parameter you
- * can erase a share.
+ * can erase a share. Newly added flows will be unrestricted.
* @param st Next Hop to be removed.
* @param flow Share to be added or removed.
*/
@@ -4154,6 +4158,7 @@ void FlowStat::ChangeShare(StationID st, int flow)
uint share = it->first - last_share;
if (flow == INT_MIN || (uint)(-flow) >= share) {
removed_shares += share;
+ if (it->first <= this->unrestricted) this->unrestricted -= share;
if (flow != INT_MIN) flow += share;
last_share = it->first;
continue; // remove the whole share
@@ -4162,6 +4167,7 @@ void FlowStat::ChangeShare(StationID st, int flow)
} else {
added_shares += (uint)(flow);
}
+ if (it->first <= this->unrestricted) this->unrestricted += flow;
/* If we don't continue above the whole flow has been added or
* removed. */
@@ -4170,7 +4176,78 @@ void FlowStat::ChangeShare(StationID st, int flow)
new_shares[it->first + added_shares - removed_shares] = it->second;
last_share = it->first;
}
- if (flow > 0) new_shares[last_share + (uint)flow] = st;
+ if (flow > 0) {
+ new_shares[last_share + (uint)flow] = st;
+ if (this->unrestricted < last_share) {
+ this->ReleaseShare(st);
+ } else {
+ this->unrestricted += flow;
+ }
+ }
+ this->shares.swap(new_shares);
+}
+
+/**
+ * Restrict a flow by moving it to the end of the map and decreasing the amount
+ * of unrestricted flow.
+ * @param st Station of flow to be restricted.
+ */
+void FlowStat::RestrictShare(StationID st)
+{
+ uint flow = 0;
+ uint last_share = 0;
+ SharesMap new_shares;
+ for (SharesMap::iterator it(this->shares.begin()); it != this->shares.end(); ++it) {
+ if (flow == 0) {
+ if (it->first > this->unrestricted) return; // Not present or already restricted.
+ if (it->second == st) {
+ flow = it->first - last_share;
+ this->unrestricted -= flow;
+ } else {
+ new_shares[it->first] = it->second;
+ }
+ } else {
+ new_shares[it->first - flow] = it->second;
+ }
+ last_share = it->first;
+ }
+ if (flow == 0) return;
+ new_shares[last_share + flow] = st;
+ this->shares.swap(new_shares);
+}
+
+/**
+ * Release ("unrestrict") a flow by moving it to the begin of the map and
+ * increasing the amount of unrestricted flow.
+ * @param st Station of flow to be released.
+ */
+void FlowStat::ReleaseShare(StationID st)
+{
+ uint flow = 0;
+ uint next_share = 0;
+ bool found = false;
+ for (SharesMap::reverse_iterator it(this->shares.rbegin()); it != this->shares.rend(); ++it) {
+ if (it->first < this->unrestricted) return; // Note: not <= as the share may hit the limit.
+ if (found) {
+ flow = next_share - it->first;
+ this->unrestricted += flow;
+ break;
+ } else {
+ if (it->first == this->unrestricted) return; // !found -> Limit not hit.
+ if (it->second == st) found = true;
+ }
+ next_share = it->first;
+ }
+ if (flow == 0) return;
+ SharesMap new_shares;
+ new_shares[flow] = st;
+ for (SharesMap::iterator it(this->shares.begin()); it != this->shares.end(); ++it) {
+ if (it->second != st) {
+ new_shares[flow + it->first] = it->second;
+ } else {
+ flow = 0;
+ }
+ }
this->shares.swap(new_shares);
}
@@ -4254,6 +4331,28 @@ void FlowStatMap::DeleteFlows(StationID via)
}
/**
+ * Restrict all flows at a station for specific cargo and destination.
+ * @param via Remote station of flows to be restricted.
+ */
+void FlowStatMap::RestrictFlows(StationID via)
+{
+ for (FlowStatMap::iterator it = this->begin(); it != this->end(); ++it) {
+ it->second.RestrictShare(via);
+ }
+}
+
+/**
+ * Release all flows at a station for specific cargo and destination.
+ * @param via Remote station of flows to be released.
+ */
+void FlowStatMap::ReleaseFlows(StationID via)
+{
+ for (FlowStatMap::iterator it = this->begin(); it != this->end(); ++it) {
+ it->second.ReleaseShare(via);
+ }
+}
+
+/**
* Get the sum of flows via a specific station from this GoodsEntry.
* @param via Remote station to look for.
* @return a FlowStat with all flows for 'via' added up.
generated by cgit v1.2.3-54-g00ecf (git 2.44.0) at 2024-06-30 09:01:44 +0000